I refuse to start watching a show until it's finished. I get to watch the entire series at my own pace (no waiting a week between episodes or years between seasons), I avoid stewing in my opinions and reading public opinion during the hiatus and having that affect my enjoyment of the next season, and I don't have to worry about the abrupt emotional disturbance of a premature cancelation. The only downside is having to avoid spoilers and not being able to join in conversation with others who are actually watching it while it originally airs.